Inspect the Battery
 

• Ensure the battery connections are clean, tight, and free of corrosion. Corroded terminals can cause intermittent electrical issues.
• Test the battery voltage with a multimeter. It should read around 12.6 volts when the engine is off and 13.7-14.7 volts when the engine is running.
• If the battery is weak or faulty, replace it with a new one that meets the factory specifications for the 2018 Chevrolet Corvette ZR1.

 
Examine the Alternator
 

• Check the alternator belt for proper tension and ensure it is in good condition.
• Test the alternator output with a multimeter while the engine is running. It should read between 13.7 and 14.7 volts. If it is outside this range, the alternator may need to be repaired or replaced.
• Inspect the wiring and connections to the alternator for any signs of damage or loose connections.

 
Check the Headlight Bulbs and Sockets
 

• Inspect the headlight bulbs for any signs of damage or wear. Replace any burnt-out or damaged bulbs.
• Examine the headlight sockets for corrosion or damage. Clean any corrosion with electrical contact cleaner and ensure that the sockets are making good contact with the bulbs.

 
Inspect Fuses and Relays
 

• Locate the fuse box, which is usually in the engine bay or under the dashboard.
• Check the fuses related to the headlights. If any are blown, replace them with fuses of the correct amperage.
• Inspect the headlight relays for proper operation. Swap the headlight relay with a similar relay in the fuse box to see if the problem follows the relay. If it does, replace the faulty relay.

 
Examine Wiring and Connections
 

• Inspect the wiring harnesses connected to the headlights for any signs of damage, wear, or corrosion.
• Ensure that all wiring connections are tight and secure.
• If you find any damaged wires, repair or replace them as needed.

 
Scan for Error Codes
 

• Use an OBD-II scanner to check for any stored error codes related to the electrical system or headlights.
• Address any codes found by following the troubleshooting steps outlined in the vehicle’s service manual.

 
Consult a Professional
 

• If you are unable to identify or resolve the issue, consult a professional mechanic who has experience with Chevrolet Corvettes.
• A certified technician can perform a more in-depth diagnosis using specialized tools and equipment.